<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style>
		          /*去掉a标签内容的下划线*/
		    a{text-decoration: none;
		    }
			/*当a标签鼠标移入时,颜色变蓝*/
			a:link{
				color:red;
			}
			/*鼠标移入颜色变蓝,并且有下滑线*/

			a:visited{
				color:orange;
			}	
			a:hover{
				color:blue;
				text-decoration: underline;
			}	
		</style>
	</head>
	<body>
		<a href="" target="_blank">首页</a>
	</body>
</html>
